Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697773 | Rotary fluid reaction device having hinged vanes | Philip Theodore Lingman, William R. Maclay | 1997-12-16 |
| 5667383 | Disposable dental prophylaxis handpiece | Philip Theodore Lingman, William R. Maclay | 1997-09-16 |